In biology, a test is the hard shell of some spherical marine animals and protists, notably sea urchins and microorganisms such as testate foraminiferans...

the tusk shells or the internal shells of the cephalopods. Many of Rumpf's terms were later adopted by Carl Linnaeus. The study of zoology, including...

by Terrestrial Gastropods: a Comparison between Shelled and Shell-Less Species". Physiological Zoology. 52 (4): 461–469. doi:10.1086/physzool.52.4.30155937...

the shell correctly identified. Some owners of shell collections hope to be able to donate their collection to a major natural history or zoology museum...

All are protected under CITES Appendix II. Depending on species, adult shell diameter is between 10 and 25 cm (4 and 10 inches). Nautilidae, both extant...

evolutionary origin of the turtle shell and its dependence on the axial arrest of the embryonic rib cage". Journal of Experimental Zoology Part B: Molecular and Developmental...

outline is provided as an overview of and topical guide to zoology: Zoology – study of animals. Zoology, or "animal biology", is the branch of biology that relates...

by Terrestrial Gastropods_ a Comparison between Shelled and Shell-Less Species". Physiological Zoology. 52 (4): 461–469. doi:10.1086/physzool.52.4.30155937...

sauropods overall is uncommon. In modern times, some molluscs employ the use of shells as armour, and armour is evident in the chitinous exoskeleton of arthropods...

The gastropod shell is part of the body of a gastropod or snail, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical...